Yep. That’s pretty common. I like the D’Addario XL (EXL165).
Yep. I went there first also. I recommend looking at these videos in this post first… Bass Setup - #108 by eric.kiser. If you want to dig real deep, there is a PDF guide linked there also. I would say, watch the videos, do the setup, and if your still not comfortable, then check out the PDF link.
I’m going to go out on a limb and say people worry about messing up when adjusting the truss rod a lot more than they should. I think it’s because it’s the one piece where you can’t see what’s going on. If it’s still bothering you after looking at the videos. That PDF does a great job explaining what’s going on inside the neck when you make adjustments.